Journal of Engineering and Applied Science

Table 5 One-way ANOVA results of impact strength: effect of injection temperature

From: Analysis of variance of injection moulding process parameters and clay particles size effects on impact strength, shrinkage and warpage of polyethylene/kaolin clay composites

	Summary
	Groups	Count		Sum		Average	Variance
< 75 μm	Melt 180	3		43.492		14.497	1.107
	Melt 200	3		45.116		15.038	1.632
	Melt 220	3		57.217		19.072	5.941
75–106 μm	Melt 180	3		36.259		12.086	0.389
	Melt 200	3		38.558		12.852	0.449
	Melt 220	3		56.871		18.957	13.224
106–150 μm	Melt 180	3		40.05		13.35	4.515
	Melt 200	3		46.167		15.389	0.655
	Melt 220	3		48.434		16.144	2.629
	ANOVA
	Source of variation	SS	df	MS	F	p-value	F crit
< 75 μm	Between groups	37.49	2	18.74	6.47	0.031	5.14
	Within groups	17.36	6	2.89
	Total	54.85	8
75–106 μm	Between groups	85.05	2	42.52	9.07	0.015	5.143
	Within groups	28.12	6	4.68
	Total	113.18	8
106–150 μm	Between groups	12.53	2	6.26	2.41	0.17	5.14
	Within groups	15.60	6	2.60
	Total	28.14	8

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